Automatic weighing-machine.



No. 680,l60. Patented Aug. 6, 190i.

.1. .1. MARSHALL. AUTOMATIC WEIGHING MACHINE.

. I Application filed Mar. 11; 1901.) (No Model.) 2 Sheets-Sheet I.

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WlLZnesses. Inventor m: NORRIS PEYEIIS co, PHOTG-LITHCL. WASHINGTON, n. c.

N0. 680.|60. Patented Aug. 6, IQUI.

J. J. MARSH ALL.

AUTOMATIC WEIGHING MACHINE.

(Application filed Mar. 11, 1901.) (N0 Moder.l fiSheets-Sheet 2 II I 2 1 l J g 23* Z Yl v I I'm/anion Wainqssea. I a I I .flZZorncya,

U ITED STATES PATENT ()FFICE.

JOHN JAMES MARSHALL, OF LEEDS, ENGLAND, ASSIGNOR TO JOHN POTTS BROWN, OF MINNEAPOLIS, MINNESOTA, AND WILLIAM HENRY SEWARD AND EDWIN POTTER CARPENTER, OF LONDON, ENGLAND.

AUTOMATIC WEIGHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 680,160, dated August 6, 1901. A pumio'n filed March 11, 1901. Serial No. 50,710. (No model.)

To all whom it may concern: slide-rods K L, working one above the other Be itknown that I, J OHN J AMES MARSHALL, in suitable hearings in a detachable bracket grocer, a subject of the King of Great Britain, M. Toward the ends of the said rods K L are residing at9 Branch road,'Armley,Leeds,Engspiral springs N N the said springs having a land, have invented certain new and useful tendency to push the rods forward toward the Improvements in Apparatus for Automatichopper-outlet. Upon the upper rod K is a ally Weighing Granular Substances, such as projecting incline or runner P, which engages Sugar, Rice, and the Like, of which the folwith a similar incline or runner R, carried by lowing is a specification. a pivoted lever S, having a supporting-link 10 My invention relates to a machine for auto- S The runners P and R are held in contact, matically weighing sugar or the like or other so as to resist the action of the spring N, by granular substances into parcels of any given means of vertical rods T T, (see Fig. 2,) which weight. bear against the top of the lever S and pass Referring to the drawings hereunto andown under the scale-beamD, (at its weighted 15 nexed, Figure 1 is a side elevation, partly in end,) the said rods T T terminating in a stirsection, of my improved weighing-machine. rup U, having a fixed guide V near the fixed Fig. 2 is a cross-section showing detached stop H. To regulate the resistance or drag of the mechanism employed for actuating the the runner R on the upper rod K, I preferably delivery-cut-ofi slides. Fig. 3 is an enlarged employ the coiled spring W, with screw ad- 20 front elevation of adjusting or compensating justment X, the said spring being placed over weight. Figs. 4 to 7 show, on an enlarged the lever S and having a loop bearing on the scale, slightly-modified arrangements of cerend over the runner-R. The rod K terminates tain parts-viz., means for preventing or rein a tapered or funnel opening A of smaller ducing vibration, as well as noise, from the diameter than thehopper-outlet, so that when 2 5 impact of the rod or slide KFig. 4 being a pushed forward under the hopper it decreases local View of part of the two sliding rods the delivery from the hopper. The rod L K and L, and Fig. 5 a plan view of the rod terminates in a slide or cut-off B, which when K, all the parts above same having been repushed forward under the tapered opening moved. Fig. 6 is a local view of the rear end A closes it and stops the delivery from the 30 of the said two rods K and L, showing an alhopper A. Suitable shields C D E may be ternative arrangement. Fig. 7 is a plan view provided to prevent loss of sugar, &c., at the of Fig. 6. hopper-outlet. As shown in the drawings,

Referring more particularly to Figs. 1 to 3, the shield O is carried by the rod L and the in constructing the machineI employa feedshield D is mounted upon and moves with 5 hopper A upon a suitable frame B for the the upper rod K. The shield E is stationary 8 reception of the sugar or other material to be and may be secured to the hopper or any other weighed. The said hopper preferably is fuu stationary part of the device. The rod L has nel-shaped and terminates at its lower end a pin F, which engages with an inclined in a circular opening. Beneath the hopper catch G, carried bya pivoted lever H, work- 40 is placed the weighing apparatus, which coning in a guide H Connected to the said lesists of a scale-pan O upon a balance-lever or ver 11 is a vertical rod J, which passes downscale-beam D in suitable bearings, and with ward through the upper part of the stirrup a preferably fixed weight E, fixed stops H and U (which acts as a guide for same) and ter- J, and a suitable adjusting eccentric weight minates immediately over the scale-beam D.

45 F. The bags or other receptacles (into which A regulating-screw K is provided for adj ust- 5 the granular material is to be discharged from ing the catch G, so as to make it more or less the hopper A) are placed one at a time upon sensitive. The adjusting weight F bears the scale-pan O,which is provided with an arm against a vertical rod L on the scale-pan G Gfor supporting them. Near the lower openand has a hook or finger M, which engages 5o ing of the feed-hopper A are two horizontal with an incline P on the rod L. (See Figs. 10o

' rial in the bag has almost reached the proper weight, the Weight of the weighted end of the balance-lever upon the bottom of the stirrup U diminishes, allowing the rods T T to rise, removing the pressure from the pivoted lever S. The spring N upon the top rod K then pushes said rod forward under the hopper, decreasing the opening and reducing the delivery from said hopper. When the scalepan 0 contains the required weight, the scale beam D rises, coming into contact with and lifting the rod J. This releases the pin F and allows the rod L to be now also shot for ward, so closing the hoppenoutlet. At the same time the incline P on the rod L lifts the eccentric weight F clear of the rod L, allowing the scale-beam D to ride at a balance, and so giving a test as to the correct weight of each parcel.

The working parts of the machine,which are all attached to the bracket M and are therefore easily removable,are or may be protected by suitable casings or covers attached in any suitable manner. The frame B is preferably supported from the stand or bed U by means of four pillars V.

Referring to Figs. 4 and 5, Y is a stop, consisting of an arm or bracket or stop-piece screwed to the side of the slide-rod K and provided with a socket or otherwise formed or adapted to receive and hold therein a pad or block or buffer or cushion Z, of rubber or other suitable elastic substance or other suitable material adapted to deaden or reduce es ieo the shock or shaking and noise which would otherwise be occasioned when said slide-rod K (upon being liberated and shot forward) comes into contact with the fixed part of the frame or bracket M, through which said rods slide, just at the moment when the said slide rod K has reached the limit of its movement to effect the partial cut-off, as aforesaid.

Referring to Figs. 6 and 7, in this case the rear end of the slide-rod K is provided with a laterally-extending arm, stop, or extendsion Y, adapted to carry and hold therein the rubber or other suitable bufier Z, which consequently will strike against the fixed part M of the frame M, as indicated in dotted lines in Fig. 7 of the drawings hereunto annexed.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

In a machine for automatically weighing granular substances, the combination with a weighted scale-beam, a scale-pan carried thereby, and a feed-hopper mounted above said scale-pan of a reciprocating rod, means carried by said rod for reducing the delivery from said hopper when reciprocated, a spring for reciprocating said rod,- a stop on said rod adapted to engage witha fixed portion of the frame, an elastic buffer interposed between said stop and portion for reducing the shock of said rod when reciprocated, means operated by said scale-beam for automatically releasing said reciprocating rod, and a second rod for cutting off the delivery from said hopper, also adapted to be operated automatically by said scale-beam, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

JOHN JAMES MARSHALL. Witnesses:

W. H. McELLRoY, ARTHUR NELSON. 

